*{
	margin: 0;
	padding: 0;
}
html, body {
    height: 100%;
    width: 100%;
    background-image: linear-gradient(120deg, #2396b0, white);
    overflow: hidden;
}

.carousel{
	height: 500px;
	width: 1200px;
	margin: 120px auto;
	position: relative;
	overflow: hidden;
}
.carousel .carousel_img ul{
	list-style: none;
}
.carousel .carousel_img ul li{
	position: absolute;
	left: 120px;
}
.carousel .carousel_img ul li img{
	width: 100%;
	height: 100%;
}
.right_btn{
	position: absolute;
	top: 50%;
	right: 10px;
	width: 30px;
	height: 30px;
	margin-top: -22.5px;
	border-top: 5px solid #eee;
	border-right: 5px solid #eee;
	transform: rotate(45deg);
	z-index: 999;
}
.left_btn{
	position: absolute;
	top: 50%;
	left: 10px;
	width: 30px;
	height: 30px;
	margin-top: -22.5px;
	border-bottom: 5px solid #eee;
	border-left: 5px solid #eee;
	transform: rotate(45deg);
	z-index: 999;
}
.circles{
	position: absolute;
	width: 260px;
	height: 16px;
	left: 50%;
	bottom: 0;
	margin-left: -130px;
	z-index: 999;
}
.circles ol{
	list-style: none;
}
.circles ol li{
	float: left;
	margin-right: 10px;
	background-color: #eee;
	width: 16px;
	height: 16px;
	border-radius: 50%;
}
.circles ol li.cur{
	background-color: #42a5f3;
}
.mask{
	position: absolute;
	width: 100%;
	height: 100%;
	background-color: black;
	opacity: 0.4;
	top: 0;
	left: 0;
}
